Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02e1de702119a41…

MALICIOUS

PDF

82.6 KB Created: 2021-09-17 11:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8495b3c5f48e420ad3a0d1b8023d6f88 SHA-1: 19f940c70ce98bccaab88bc3592767b8c7214c0f SHA-256: b02e1de702119a417a57781cb394808280dbf749b64affc8267a516e23be10b7
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document exhibits multiple indicators of malicious intent, including a high ML classifier score and ClamAV detection as a phishing trojan. It contains numerous external URLs, suggesting it's part of a link farm designed to redirect users. The presence of a 'download button' lure and instructions for a password-protected archive strongly indicate a phishing or malware delivery attempt, likely aiming to trick users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://krisoc.ru/uplcv?utm_term=ppsspp+gold+gta+5+zip+file+download+android
    • https://digireg.sk/upload/69440674039.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140b75dc2086---fumilutizarewizi.pdf
    • http://www.beautyvogue.ch/Files/file/24777772362.pdf
    • http://free-note.kr/files/fckeditor/file/11479981396143de34865cb.pdf
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/932590053.pdf
    • https://www.nickelmarket.co.za/includes/ckfinder/userfiles/files/8377592418.pdf
    • http://bortran.com/upload/image/file/20210901040640.pdf
    • http://quanhoangtsi.com/upload/quangtri/files/5459722501.pdf
    • https://agrocare.ro/ckfinder/userfiles/files/fodidowukitu.pdf
    • http://farmaciafici.com/userfiles/files/16727246460.pdf
    • http://files.ibiza-ferien.de/file/kigimaranadedalejegowa.pdf
    • https://bushregenerators.com/userfiles/files/puvasiluvus.pdf
    • http://dhf-china.com/d/files/lijutokojusujekonovegokuk.pdf
    • https://sportnazona.bg/f/uploads/files/76791656968.pdf
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/68429140576.pdf
    • https://allora-tour.by/var/upload/file/93031593607.pdf
    • https://k31szmq42-nu28.com/contents/files/88905007837.pdf
    • http://sobinco.cz/ckfinder/userfiles/files/loloviretevukuzarizugulex.pdf
    • http://abw10thstreetne.com/uploads/files/76919531600.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/1ba342c263382e6e9a1986c95025c33b/xidetirorofoxavatojod.pdf
    • http://mnarch.it/userfiles/files/27382789571.pdf
    • http://jyotiacademicpress.org/uploads/file/kedumizodud.pdf
    • https://computerzone.pk/file/1004216087.pdf
    • http://aaz.sk/editor_uploads/files/bumudigoramixejixes.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd05.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD05 16792 bytes
font_01_sfnt_off0000f517.bin
d2eaaa136294ec0ae08cf5ee26877c84ab1e617c5a5d9613176a950864131198		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF517 17628 bytes
font_02_sfnt_off00012327.bin
27e407d3248eb91e5964b28850e3931d682765e9801c84a93a5edf6bc7f4e261		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12327 10952 bytes

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